Cloning a Vector String causes warning: unchecked

I have a Vector<String> that I want to clone and store in another Vector<String>. I can't figure out why I get a warning.
Vector<String> DATA = new TestData1().getData();
Vector<String> nuDATA;
//@SuppressWarning( "unchecked" )
nuDATA = (Vector<String>) DATA.clone();The warning i get is "warning: [unchecked] unchecked cast"
found: Object
required: Vector<String>
So I understand the clone() function returns an Object. But why on earth can't I cast it into a Vector<String>?
Also, the SuppressWarning line of code causes its own error when uncommented...
Message was edited by:
pfhat

True, and due to the fact that it always will be a Vector<String> and never anything else, there really is no need to "fix" this.
BUT
that being said, it's not 'graceful' the way it is now, and that annoys me. Plus maybe in the future i'll need to know how to do this the right way.

Similar Messages

Warning:unchecked cast

I am one of the many that have this compiler problem. When i compile this program( i want to check how it works).
import generated.*;
import javax.xml.bind.*;
import java.io.File;
import java.util.List;
public class JAXBUnMarshaller {
public void unMarshall(File xmlDocument) {
    try {
JAXBContext jaxbContext = JAXBContext.newInstance("generated");
Unmarshaller unMarshaller = jaxbContext.createUnmarshaller();
JAXBElement<CatalogType> catalogElement =     (JAXBElement<CatalogType>)
unMarshaller.unmarshal(xmlDocument);
CatalogType catalog=catalogElement.getValue();
     System.out.println("Section: " + catalog.getSection());
     System.out.println("Publisher: " + catalog.getPublisher());
     List<JournalType> journalList = catalog.getJournal();
     for (int i = 0; i < journalList.size(); i++) {
          JournalType journal = (JournalType) journalList.get(i);
          List<ArticleType> articleList = journal.getArticle();
            for (int j = 0; j < articleList.size(); j++) {
              ArticleType article = (ArticleType)articleList.get(j);
System.out.println("Article Date: " + article.getDate());
System.out.println("Level: " + article.getLevel());
System.out.println("Title: " + article.getTitle());
System.out.println("Author: " + article.getAuthor());
catch (JAXBException e) {
System.out.println(e.toString());
     public static void main(String[] argv) {
          File xmlDocument = new File("catalog.xml");
          JAXBUnMarshaller jaxbUnmarshaller = new JAXBUnMarshaller();
          jaxbUnmarshaller.unMarshall(xmlDocument);
IT responds to me
_JAXBUnMarshaller.java:15:warning: [unchecked] unchecked cast_
found: java.lang.Object
required:javax.xml.bind.JAXBElement(generated.CatalogType)
Can anyone help?

Yep. Looks as if that's 'cause of
JAXBElement<CatalogType> catalogElement = (JAXBElement<CatalogType>)unMarshaller.unmarshal(xmlDocument);The Java compiler is warning you that it has no way of ensuring (either at compile time or at runtime) that the JAXBElement is actually an element with the type CatalogType. So if you're wrong, things won't work the way you expect.
You can safely ignore this warning if you're certain you're correct; the compiler is just drawing your attention to the possibility. Ideally, you'd have an API that returned the correct type rather than just an Object, but the Unmarshaller class doesn't have that capacity. So you'll just have to check it yourself to make sure it's right.

Warning: [unchecked] unchecked conversion.. how to avoid this warning?

Hi all,
When i compile my java file, i get this warning.
Z:\webapps\I2SG_P2\WEB-INF\classes\com\i2sg>javac testwincDB.java
Note: testwincDB.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
Z:\webapps\I2SG_P2\WEB-INF\classes\com\i2sg>javac -Xlint testwincDB.java
testwincDB.java:15: warning: [unchecked] unchecked conversion
found   : java.util.ArrayList
required: java.util.ArrayList<java.lang.String[]>
    ArrayList <String[] > recRep2 = dbh.getReconReport2(projID);My functions are:
public ArrayList getReconReport2(int projID)
        ArrayList <String[] > recRep2 = new ArrayList <String[] > ();
        String getReconReportQuery2 = "select recon_count FROM i2sg_recon1 WHERE PROJECT_ID = " + projID;
        int i=0;
        try {
        resultSet = statement.executeQuery(getReconReportQuery2);
              while (resultSet.next())
                     recRep2.add(new String[1]); // 0:RECON_COUNT
            ((String []) recRep2.get(i))[0] = resultSet.getString("RECON_COUNT");
                     i++;
              resultSet.close();
              } catch (Exception ex)
            ex.printStackTrace(System.out);
        return recRep2;
    }and
import java.sql.*;
import java.util.ArrayList;
import java.util.*;
public class testwincDB
    public static void main(String args[])
    int projID=8;
    wincDB dbh = new wincDB();
    ArrayList <String[] > recRep2 = dbh.getReconReport2(projID);
    int totalRec = recRep2.size();
     for(int i=0;i<totalRec;i++)
    System.out.println(((String []) recRep2.get(i))[0]);
}Thanks in advance,
Lakshma

found : java.util.ArrayList
required: java.util.ArrayList<java.lang.String[]>
ArrayList <String[] > recRep2 = dbh.getReconReport2(projID);This tells all about the warning.....
public ArrayList getReconReport2(int projID)change it to:
public ArrayList<String[]> getReconReport2(int projID)Thanks!
Edit: Very late.... :-)
Edited by: T.B.M on Jan 15, 2009 7:20 PM

Warning: [unchecked] unchecked call to getMethod when updating to JDK 1.6

I'm received the following compilation warnings after I switched to Java 6 from Java 5:
warning: [unchecked] unchecked call to getMethod(java.lang.String, java.lang.Class<?>...> as a member of the raw type java.lang.Class
removeChangeListener = myParent.getMethod("removeChangeListener",
changeListenerParameterTypes);
The code is this class is instantiated by many classes. The class instantiating this class is passed through a constructor.
Here is a partial code snippet of the class, constructor and method where the warning occurs:
public class DumpDisplay extends javax.swing.JFrame implements javax.swing.event.ChangeListener
private Class changeListenerParameterTypes[] = new Class[2];
public DumpDisplay(Object mvc)
Class myParent = mvc.getClass();
public void removeListeners()
Method removeChangeListener = null;
changeListenerParameterTypes[0] = ChangeListener.class;
changeListenerParameterTypes[1] = Integer.TYPE;
// Get the removeChangeListener method from the MVC class
try
removeChangeListener = myParent.getMethod("removeChangeListener",
changeListenerParameterTypes);
catch (NoSuchMethodException e)
System.out.println(" DumpDisplay class addChangeListener method: "+e);
This compilation warning does not appear in JDK 1.5. Any assistance is greatly appreciated.

Class myParent = mvc.getClass();Class<?> myParent = mvc.getClass();

Warning: [unchecked] unchecked cast.

Hello!
I have a problem with this code.
I get:
warning: [unchecked] unchecked cast.
How should i do the cast?
Or is it something else that i have done wrong?
Socket socket = new Socket("localhost", this.port);
LinkedList<String> times = new LinkedList<String>();
ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
try
    times = (LinkedList<String>)ois.readObject();
catch(ClassNotFoundException cnfe)
}

That's because it is not 100% sure (at compile time) that the object is really of a type LinkedList<String>, that's why you received a warning (note that this is just a warning: not an exception or error). You cannot do anything about is. You could suppress the warning like this:
    @SuppressWarnings("unchecked")
    void yourMethod() {
        try {
            Socket socket = new Socket("localhost", 666);
            LinkedList<String> times = new LinkedList<String>();
            ObjectInputStream ois = new ObjectInputStream(socket.getInputStream());
            times = (LinkedList<String>)ois.readObject();
        } catch(Exception cnfe) {
            cnfe.printStackTrace();
    }Good luck.

Warning: [unchecked] unchecked cast found

I am getting the following warning when I compile my code. Please help.
warning: [unchecked] unchecked cast
found : java.lang.Object
required: java.util.Vector<java.lang.Long>
copy.path = (Vector<Long>) this.path.clone();
1 warning
Here is the code
* To change this template, choose Tools | Templates
* and open the template in the editor.
package cs572project1;
import java.util.*;
* Richard Becraft
* 1/22/2010
* CS 572 Heuristic Problem Solving
* This class represents a node in a search tree of a graph that represents a street map.
public class SearchNode implements Cloneable {
public long depth;
public double costSoFar;
public double estimatedCostToGoal;
public Vector<Long> path;
public SearchNode() {
depth = -1;
costSoFar = -1;
estimatedCostToGoal = -1;
path = new Vector<Long>(20, 20);
public void printSearchNode() {
System.out.println("\n****In printSearchNode");
System.out.println("depth: " + depth + " costSoFar: " + costSoFar + " estimatedCostToGoal: " + estimatedCostToGoal);
for (Enumeration<Long> e = this.path.elements(); e.hasMoreElements();) {
System.out.println(e.nextElement());
System.out.println("****Exiting printSearchNode\n");
@Override
public SearchNode clone() {
SearchNode copy;
try {
//System.out.println("in clone SearchNode");
copy = (SearchNode) super.clone();
copy.path = (Vector<Long>) this.path.clone(); // <<<< the offending line
//copy.path = new Vector<Long>(this.path.capacity());
//this.printSearchNode();
//System.out.println("copy.path.size: " + copy.path.size());
//System.out.println("this.path.size: " + this.path.size());
//System.out.println("copy.path.capacity: " + copy.path.capacity());
//System.out.println("this.path.capacity: " + this.path.capacity());
//Collections.copy(copy.path, this.path);
} catch (CloneNotSupportedException e) {
throw new RuntimeException("This class does not implement Cloneable " + e);
return copy;
}

rickbecraft wrote:
I am getting the following warning when I compile my code. Please help.
warning: [unchecked] unchecked cast
found : java.lang.Object
required: java.util.Vector<java.lang.Long>
copy.path = (Vector<Long>) this.path.clone();The variable path has a type of Vector but clone() returns an Object. It is only a warning, not an error, so you can ignore it - I think you can be confident that clone() will always return a Vector. A slightly more typesafe approach (in my opinion) is to create a new Vector<Long> using the constructor that takes a Collection as an argument, passing in the Vector that you want to clone. Something like
copy.path = new Vector<Long>(this.path);

Netbeans warning: unchecked/unsafe operations

I get the following warnings when I compile my project in netbeans:
Note: Some input files use unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.
When I re-compiled, I get 37 warnings similar to:
warning: [unchecked] unchecked call to addElement(E) as a member of the raw type java.util.Vector
all involving adding/inserting/removing elements in a vector...any ideas why?

if you're not using 1.5, you can turn off the warnings by changing the source compability level in NetBeans. In your Project Properties, look under the Sources node at the bottom of the window you'll see a "Source Level" drop-down list. Change it to 1.4.

How can I put a stl::vector string into the DB and then get it out?

Hello,
As the title, here's a test case with problems,but anyway you can still run it. ( VC6/XP-32/BDB 4.7 )
I know this may be wrong,and I'd like to know how can I do this.
Can someone help me please? I would appreciate it very much.
************ Copy,Compile and Run ***************
#include <iostream>
#include <vector>
#include "db_cxx.h"
int main()
     std::string dbName("database.db");
     u_int32_t db_flags=DB_CREATE;
     Db* db=NULL;
     // Prepare key(int)/data(vector<string>) pair.
     int int_key=2;
     std::vector<std::string> rec_data;
     rec_data.push_back("apple");
     rec_data.push_back("Bob");
     rec_data.push_back("Me");
     // Prepare Dbt for receiving.
     std::vector<std::string> rec_readData;
     Dbt readData;
     readData.set_data(&rec_readData);
     readData.set_ulen(sizeof(rec_readData));
     readData.set_flags(DB_DBT_USERMEM);
     try
          // Open database.
          db = new Db(NULL,0);
          db->open(NULL,dbName.c_str(),NULL,DB_BTREE,db_flags,0);
          // Put
          int ret;
          if(ret=db->put(NULL,new Dbt(&int_key,sizeof(int_key)),new Dbt(&rec_data,sizeof(rec_data)),DB_NOOVERWRITE)==0)
               std::cout<<"put successful!"<<std::endl;
          else { db->err(ret,"Db->put"); }
          // Get
          if(ret=db->get(NULL,new Dbt(&int_key,sizeof(int_key)),&readData,0)==0)
               std::cout<<"get successful!"<<std::endl;
          else { db->err(ret,"Db->get"); }
     catch(DbException &e)
          std::cerr<<"Error: ";
          std::cerr<<e.what()<<std::endl;
     // Close the database
     try
          if(db!=NULL)
               db->close(0);
     catch(DbException &e)
          std::cerr<<"Error closing database: ";
          std::cerr<<e.what()<<std::endl;
     // Display the results.
     // Index out of bounds. <-----
     std::cout << rec_readData[0].c_str();
     std::cout << rec_readData[1].c_str();
     std::cout << rec_readData[2].c_str();
     system("pause");
     // Press any key to go wrong. :(
     return 0;
Regards,
legendsino

You need to convert the std::vector<std::string> into a sequence of bytes. For example, if all strings are shorter than 256 characters, you could create a fresh output string, iterator through the vector, and for each element, append the string length to the output string, followed by the string contents.
Note that ordering in the database will be different from lexicographic order, and you have to keep that in mind when performing range queries.

Unflatten From String causes runtime error in LV2009

I found this error when trying suggestions made in this thread.
http://forums.ni.com/ni/board/message?board.id=170&thread.id=458335
Unflaten from string causes runtime Error 74 possible reason(s) Memory or data structure corrupt.
Attachments:
Unflatten runtime error.vi ‏8 KB
error1.jpg ‏13 KB

Of course you are getting the error. The data types are inconsistent. You convert the cluster to an array. You then define the type of flattened string as a cluster. Either don't convert to an array or define the data type as an of paths. Look again at the examples in that post.

Are Vector Integer and Vector String different types?

Maybe I am missing something.
Are Vector <String> and Vector <Integer> different types? Can I have to methods of the same name with arguments of these types? That would be the point of method overloading.
Appearently not. The following code does not compile:
import java.util.*;
public class b {
        public static void doit(Vector <String> what) {
                what.add(new String(""));
        public static void doit(Vector <Integer> what) {
                what.add(new Integer(0));
}$ javac -target 1.5 -source 1.5 b.java
b.java:3: name clash: doit(java.util.Vector<java.lang.String>) and doit(java.util.Vector<java.lang.Integer>) have the same erasure
public static void doit(Vector <String> what) {
^
b.java:6: name clash: doit(java.util.Vector<java.lang.Integer>) and doit(java.util.Vector<java.lang.String>) have the same erasure
public static void doit(Vector <Integer> what) {
^
2 errors

So it is not possible to have both methods in a class. Let us do instanceof instead.
import java.util.*;
public class b {
        public static void doit(Vector what) {
                        if (what instanceof Vector<String>) {
                               what.add(new String(""));
                        else if (what instanceof Vector<Integer>) {
                               what.add(new Integer(0));
}javac -target 1.5 -source 1.5 b.java
b.java:4: illegal generic type for instanceof
if (what instanceof Vector<String>) {
^
b.java:7: illegal generic type for instanceof
else if (what instanceof Vector<Integer>) {

Warning "unchecked or unsafe operations" when use Vector

Can any one tell me why i get "unchecked or unsafe operations " warning.
What I want to do is return 2 vector from the first method but i figure out by making it as object array would make thing easier for me. Then i try to use it on the second method and it give me error. The program still run fine but I just want to know what happen and what the affect of keeping it?
   public static Object[] chessPosition()
        Vector <Component> blackLocation = new Vector <Component> ();
        Vector <Component> whiteLocation = new Vector <Component> ();
         for(int y = 0; y < 8; y++)
             for(int x = 0; x < 8; x++)
                 Component c = ChessBoard.board.findComponentAt(x*75, y*75);
                 if(c instanceof JLabel)
                     if(c.getName().startsWith("white"))
                         whiteLocation.add(c);
                     if(c.getName().startsWith("black"))
                         blackLocation.add(c);
        Object [] a = new Object[2];
        a[0] = blackLocation;
        a[1] = whiteLocation;
        return a;
    public static void blackPotential()
        Object[] a = chessPosition();
        Vector <Component> blacks = (Vector <Component>)a[0];
    }Thanks in advance

Lest I make a jackhole of myself:
        Object[] a = chessPosition();
        Vector<Component> blacks = (Vector<Component>) a[0]; You're casting objects to a vector of Components.
Try this on for size:
    public static Vector<Vector<Component>> chessPosition()
        Vector<Component> blackLocation = new Vector<Component>();
        Vector<Component> whiteLocation = new Vector<Component>();
        for (int y = 0; y < 8; y++)
            for (int x = 0; x < 8; x++)
                Component c = ChessBoard.board.findComponentAt(x * 75, y * 75);
                if (c instanceof JLabel)
                    if (c.getName().startsWith("white"))
                        whiteLocation.add(c);
                    if (c.getName().startsWith("black"))
                        blackLocation.add(c);
        Vector<Vector<Component>> v = new Vector<Vector<Component>>();
        v.add(blackLocation);
        v.add(whiteLocation);
        return v;
    public static void blackPotential()
        Vector<Vector<Component>> a = chessPosition();
        Vector<Component> blacks = (Vector<Component>) a.get(1);
    }Joe
XLint's still your friend
Message was edited by:
Joe_h

Object Causes Wrap-Uncheck as default?

Hello all,
I am a Pages lover who could use some advice customizing the application. 99% of the time I don't want my objects to cause wrap so I find myself continuously having to open the inspector and uncheck that option.
Is there a way to change the default status of this option?
Thanks

My brute force soluce.
Open the folder:
"<startupVolume>:Applications:iWork '08:Pages.app:Contents:Resources:Templates:Blank:Blank.template:"
Double click on index-iso.xml.gz to expand it as index-iso.xml
or
Double click on index-trad.xml.gz to expand it as index-trad.xml
For safe, move the Index-xxx.xml.gz file to the folder "<startupVolume>:Applications:iWork '08:Pages.app:Contents:Resources:Templates:Blank:"
Open the index-xxx.xml
search for the string "sf:floating-wrap-enabled="
When you reach the last one, replace the trailing "true" by "false".
So you will get:
<sf:graphic-style sfa:ID="SFDGraphicStyle-34" sf:name="graphic-image-style-default" sf:ident="graphic-image-style-default"><sf:property-map><sf:stroke><sf:stroke sfa:ID="SFRStroke-67" sf:miter-limit="4" sf:width="1" sf:cap="butt" sf:join="miter"><sf:color xsi:type="sfa:calibrated-white-color-type" sfa:w="0" sfa:a="1"/><sf:pattern sfa:ID="SFRStrokePattern-62" sf:phase="0" sf:type="empty"><sf:pattern/></sf:pattern></sf:stroke></sf:stroke><sf:shadow><s f:shadow-ref sfa:IDREF="SFRShadow-0"/></sf:shadow><sf:reflection><sf:null/></sf:reflection>< sf:layoutStyle><sf:null/></sf:layoutStyle><sf:externalTextWrap><sf:external-text -wrap sfa:ID="SFWPExternalTextWrap-16" sf:wrap-style="tight" sf:floating-wrap-enabled="false" sf:direction="both" sf:attachment-wrap-type="unaligned" sf:floating-wrap-type="directional" sf:margin="12" sf:alpha-threshold="0.5"/></sf:externalTextWrap><sf:opacity><sf:number sfa:number="1" sfa:type="f"/>
Save the xml file.
The next time you will use this template, inserted graphic objects will default to no-wrap.
Yvan KOENIG (from FRANCE lundi 6 octobre 2008 19:04:15)

Bind Variables with AND in String causing Issues in XML & Report Outputs

Hi all,
I'm creating a BI Publisher report (10.1.3.2) and am experiencing an issue with the interprutation of Bind Variables in the Data Template.
Here is an example of some of the Data template
<dataTemplate name="BudgetDataBU" description="BudgetDataBU" dataSourceRef="DLXN">
   <parameters>
      <parameter name="p_Year" dataType="Integer" include_in_output="true"/>
      <parameter name="p_Measure" dataType="character" include_in_output="true"/>
      <parameter name="p_Currency" dataType="character" include_in_output="true"/>
      <parameter name="p_Version" dataType="character" include_in_output="true"/>
   </parameters>
   <dataQuery>
      <sqlStatement name="BusUnits">
           <![CDATA[SELECT DISTINCT CC.BUSINESS_UNIT as BUSINESS_UNIT
                    FROM   DLXN_FACT_DATA_DET FD,
                           DLXN.COST_CENTRE CC
                    WHERE FD.COST_CENTRE = CC.COST_CENTRE
                    AND FD.CAL_YEAR    = :p_Year
                    AND FD.Currency      = :p_Currency
                    AND FD.Measure      = :p_Measure
                    AND FD.Version        = :p_Version
                    AND CC.DLXN_VIEW = 'Delexian' ]]>
           </sqlStatement>
       <sqlStatement name="Details">
           <![CDATA[SELECT DLXN_FACT_DATA_DET.VERSION,
                           DLXN_FACT_DATA_DET.CURRENCY,
                           DLXN_FACT_DATA_DET.CAL_YEAR as CAL_YEAR,
                           SUM(nvl(DLXN_FACT_DATA_DET.JAN_AMT,0)) as JAN_AMT,
        </sqlStatement>
    </dataQuery>The problem is with the :p_Measure Bind Variable but it could just as easily be any of the other character parameters.
The particular string value that is causing a problem is "Travel and Expenditure". I believe it is due to the "AND" in the string but this string value cannot be changed in the database to say "Travel & Expenditure".
I have thought about using a REPLACE function in the SELECT statement but see this as an ugly solution.
Any input greatly appreciated.
Kind Regards,
Gary.

We remove this restriction ,fix included in BI Publisher July 2009 update for 10.1.3.4.x. The patch number is 8704846.

Sub-Organization's Network control Policy used by a vNIC Template causes Warning

Hi,
using UCSM 1.4.(1i) if a Network Control Policy defined in a Sub-Origaniziation is used by a vNIC Template the following warning shows up:
* Description:
** Policy reference nwCtrlPolicyName does not resolve to named policy.
* ID: 792882
* Cause: named-policy-unresolved
* Code: F4526851
This does not happen if the network control policy has been defined in the "root" organization.
Any ideas on how to get rid of that warning?
Ralph

Ralph,
I have had the same problem in my environment for awhile. I have been ignoring it because even though the warning says the policy can't be found when I check the NIC Templates in the server OS they are able to see the CDP information so the settings have been working. I found that if I just go ahead and create another policy in root with the same name the warnings all clear. I figure this is some buggy alert. I know the change in setting was getting recognized and if the vNIC Template can't find it then why would it be an option in the drop down right? Either way taking advantage of the fact that if it can't find it in the sub-org the UCS automatically searches for the same named item in the root org, I didn't need to change vNIC Templates I just had to let it find the new one in root.
I also find it interesting that no VNIC has this problem just VNIC Templates.

Cloning of vectors

Hi all,
I have a java.util.Vector v which I would like to pass a clone as a parameter in a recursive routine.
The routine is defined as:
boolean find(int, int, int, java.util.Vector)
However, when I call using
find(i,j,k, v.clone());
it gives me the following message:
C:\Maze.java:369: find(int,int,int,java.util.Vector) in MazeClass cannot be applied to (int,int,int,java.lang.Object)
if(find(x+1,y,step,v.clone()))foundSolution=true;
The object returned by clone() is supposed to respect the property:
x.clone().getClass() == x.getClass()
I have also tried casting the result
(java.util.Vector)v.clone()
to get around the problem, but java complains
Note: C:\Maze.java uses unchecked or unsafe operations.
I suppose I am missing something here. Could someone shed some light on this?
Many thanks.

Thanks for the assurance.
I guess I will live with it, although I am still not
convinced why clone() does not return the copy as a
class of the original.It does. Just the reference is of type Object. Because that's what clone() is defined to return by the API.

Cloning a Vector String causes warning: unchecked

Similar Messages

Maybe you are looking for